Poet's wretched trouble with a single romance yarn (5,5)

I believe the answer is:

lorna doone

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'single romance yarn' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.

'poet's wretched trouble with a' is the wordplay.
'poet's wretched' becomes 'lorn' (I can't justify this - if you can you should believe this answer much more).
'trouble' becomes 'ado' (both can mean bother or commotion).
'with' means one lot of letters go next to another.
'a' becomes 'one'.
'lorn'+'ado'+'one'='LORNA DOONE'

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(Other definitions for lorna doone that I've seen before include "woman in novel" , "Novel by R.D. Blackmore" , "Richard Doddridge Blackmore heroine" , "R. D. Blackmore novel" , "book" .)

I've seen this clue in The Times.

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